Jefftron Active Brake II MOSFET With Wiring


Jefftron Active Brake II MOSFET With Wiring


In stock



This is a professionally made MOSFET with motor active braking designed for airsoft electric guns (AEG).

This Jefftron MOSFET prevents your airsoft weapon from potential damage during the semi-fire mode. It prevents your piston from being stretched, ensures your spring is fully released and generally ensures that the parts in your gearbox are not under strain.

This Active brake solves the common issue of multiple shots firing when your gun is in semi mode, often seen in weapons with a very high rate of fire (ROF).

This Jefftron device increases your airsoft guns rate of fire and, thanks to it's upgraded wiring your battery will also last longer.


  • Presoldered wires allows faster and easier installation into the gun, it is long enough for all kind of weapons. Simply cut wires to the required length and attach connectors (included in the package)
  • On the devices are four pre-soldered high quality 1,5qmm (AWG16) power wires covered with silicon insulation and two 0,25qmm (AWG24) signal wires
  • Coated with lacquer, to protect the device against water
  • If you want to use your own wires, choose variant without wiring
  • Designed for spring up to M210 (equivalent for current 150A single shot fire or 50A burst fire for max. 30s)
  • Specified for common batteries up to 17V (Ni-xx 8.4 - 12V, lipol 7.4 - 14.8V)
  • Active braking uses excess energy from the motor to stop it. The braking effect is the most powerful with high torque motor
  • 6 wires connection
  • Device size 35x12x7mm
  • No current consumption in the idle mode
  • No sparking on switch contacts


  • Device with wiring
  • DeanT connector male
  • 30A mini fuse
  • 4x faston female 2,8mm
  • 6x black heat shrink tube 3,2mm - length 20mm
  • 3x black heat shrink tube 4,8mm - length 20mm
  • Installation manual in English

Please note - Fitting this part requires gun disassembly and reassembly, and should be fitted by an experienced airsoft technician.

Remember - if you don't feel comfortable carrying out your own gun servicing, repairs or upgrades, we have experienced airsoft technicians in-store and can do the work for you. You can even book a service with us online by clicking the link below!

Book a Gun Service.


To buy an airsoft weapon in the UK you must have a valid airsoft defence.

This is not a licence, it is basically just proof that you intend to buy an airsoft weapon for use in airsoft.

An airsoft defence could be a UKARA or membership with the British Airsoft Club, and various other forms of defence.

You can only obtain an airsoft defence once you are over the age of 18.

To get an airsoft defence the law is that you should play at least 3 games of airsoft, and that you must have been playing for at least two months.
You can still buy an airsoft gun without a defence, provided you are 18 or older. If you choose to do this we would, by law, two tone (paint in a bright colour) parts of your chosen weapon. This is because an airsoft gun is considered a RIF aka Realistic Imitation Firearm, because they are so close to the real steel, whereas when you paint parts of it in a bright colour it becomes an IF aka Imitation Firearm. The reason being that the bright colours make it look less realistic to the public, and therefor less likely to be mistaken as real, were it to be used for any other purpose than airsoft.

When you order a gun from us you will need to add your defence details in the comments section of the cart. If you do not have a defence you will need to write the colour that you wish to be used for two toning your airsoft weapon.

Here is what's stated in the VCRA (Violent Crime Reduction) Act:

For airsoft skirmishing, the Association of British Airsoft is putting in place arrangements to allow retailers to check that individual purchasers are members of a genuine skirmishing club or site. The key elements of these arrangements are:
1. new players must play at least 3 (three) times in a period of not less than two months before being offered membership
2. membership cards with a photograph and recognised format will be issued for production to retailers
3. A central database will be set up for retailers to cross-check a purchaser’s details
4. member’s entry on the database will be deleted if unused for 12 months.
The defence for airsoft skirmishing can apply to individual players because their purchase of realistic imitation firearms for this purpose is considered part of the “holding” of a skirmishing event.
Size Chart